The well aligned ZnO nanorods were grown on glass substrate by using hydrothermal method. The seed layer was formed by using zinc acetate, ethanol and deionised water using dip coating technique. The ZnO nanorods were grown over the seed layered ZnO thin film using Zinc nitrate, Hexamethylenetetramine and deionised water. The prepared ZnO nanorods were characterized by XRD, SEM, and UV – Visible spectroscopy. The prepared ZnO nano rods have wide range of applications in Photo catalytic degradation of textile colouring dyes.